. >> for the best chance, west virginia university's chief of neurosurgery, dr. julian bailes, has been called in. he's a man in the business of saving lives for more than two decades. >> this lady has a tremendously big blood clot. the aneurysm ruptured. she's in a deep coma. the only hope she has is that we can get the clot out. so, let's go in and cure her. the brain is undoubtedly the most complex structure on the face of the earth. it's the most precious real estate in someone's body, and something we work day and night to try to preserve or to alleviate suffering as much as we can. >> all right, yous be good. i love yous. >> kristy macdonald is a 30-year-old single mother. her seizures started just three years ago and are getting worse. >> right now, life is hell. >> contorting of the body and, you know, her head would just turn. i mean, almost like "the exorcist." it was really just that scary. >> hey, kristy. >> despite a daily regimen of medication to treat them, kristy's seizures are becoming more frequent. >> hey, kristy. you're all right. >> in a day,